Tweezers



M. M. COREY TWEEZERS Nov. 27, 1923. 1,475 589 Filed Nov. 6. 1922 /Vl/ENTO/? M477 M Carey .tatented Nov. 2?, 1923.

tllllTEfi STATES PATENT OFFICE.

MA'TT IVI. COREY, OF CHICAGO, ILLIHOIS, ASSIGNGR T0 3. D. SWISI-IER MFG. (30., OF

CHICAGO, ILLINOIS,

CQBPORATION OF ILLINOIS.

TVTEEZERS.

Application filed November 6, 1922.

To (ZZZ whom it may concern...

Be it known that I, MATT M. Conny, a citizen of the United States of America, and a resident oi. Chicago, in the county oi Cook and State of Illinois, have invented certain new and useful Improvements in Tweezers, of which the following is a specification.

My invention relates to tweezers, and has for its object simplification in structure and manufacture, and at the same time securing improved accuracy in the finished article.

in the accompanying drawings Fig. 1 is a side elevation;

Figs. 2 and 3 are rear and front elevations respectively; and

l ig. 4: is an enlarged perspective View of the two parts before being secured together.

The device consists of legs 10 and 11 which are niped from sheet metal or". a resilient character. Both. legs are curved as shown in Figs. 1 and 1, or may be otherwise shaped may be desired. The device shown in the drawings is designed specially for handling removable rubber type to be held in type holders. On the leg 10 is an extension 12 which is used in pushing the type along in the holder.

On the leg 10 at a. predetermined distance from the tip 13, are wings 1 1 which are integral with the leg 10 and are bent up (as shown in Fig. 4) at the time the leg is stamped out, or immediately after such stamping. On the leg 11 is a neck 15 which is between projections 16 and 17 on said leg. The distance across the neck 15 is a trifle less than the distance between the wings 1 1 when they are formed up as shown in el. And the distance between the projections 16 and 1'? is a trifle more than the length of the wings 141.

These distances are such that the legs of Fig. i may be readily placed together for assembling, and when so placed there will be only a very small amount of looseness. This looseness is for convenience in assembling. it is to be observed that when the parts are placed together in this manner, the wings 14. embrace the neck 15, and the projections 16 and 17 embrace the wings 1 1. When the parts are so assembled, they are placed in a die press which forces the wings 14 in on to the neck 15, as shown in Fig. 2. In this condition the legs are secured firmly together.

Serial No. 599,188.

The wings 14 are formed up in the stamping process so that the surfaces facing each other are parallel with the axis of the leg 10, and the sides of the neck 15 between the projections 16 and 17 are parallel with the axis of the leg 11. The result is that when the two parts are assembled and the wings lat are forced down in a press, the axes of the two legs are parallel with each other without special adjustment to secure that result.

It is to be noticed that the inner edges of the projections 16 and 17 taper slightly at the junction with the sides of the neck 15. I

When the wings are in the position shown in Fig. 4. and are slightly further apart than the distance across the neck 15, this taper provides the necessary looseness for permitting ready assemblage. lVhen, however, the wings are forced inward undera press, the edges oi? the wings travel along these inclines and are finally gripped firmly between the projections 16 and 17. Stated in another form, the parts as shown in Fig. 4 are so constructed that they are loose for assembling, but when placed under the press the wings embrace the neck so as to automatically bring the axes of the legs in line with each other, and the projections embrace the wings so as to bring them automatically to a definite longitudinal relationship to each other. The distance from the neck to the tip 18 is such that when this die press operation is completed, the tips 13 and 18 will be directly opposite each other as shown in Fig. 1.

Tweezers are ordinarily constructed by securing the legs together withrivets which pass thru the legs at positions which would. correspond to the neck 15. To hold the legs from displacement there must be two rivets at different positions along the axes of the legs. To make easily assembled, the holes for the rivets must be slightly larger than the rivets themselves. This looseness permits error in the placement of the legs with respect to each other, and there is no means for automatically correcting this error. Even when the legs are properly placed, the fact that the holes are larger than the rivets permits one leg to be displaced rotatively with respect to the other if it is accidently placed under strain.

In the present device there are no rivets, the entire device consisting of only two pieces, There being no rivets, there is no possibility of one leg being displaced with neck arranged to fit between said wings and respect to the other by any strainless than having projections at each end of said neck, that which would deform the metal of the said legs being secured together by folding device itself. I over said wings on said neck and between What I claim is: said projections. In tweezers, a leg having integral wings formed thereon, and a second leg having a MATT M. COREY. 

